#181D4F#181D4F

#181D4F is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.0% C 0.091 H 273.9°. Best body text is #FFFFFF at 15.82:1 contrast (WCAG AA passes).

Color values

HEX	#181D4F
RGB	rgb(24, 29, 79)
HSL	hsl(235, 53%, 20%)
HSV	hsv(235, 70%, 31%)
CMYK	cmyk(69.6%, 63.3%, 0%, 69%)
CIE-LAB	lab(13.46, 16.11, -31.54)
CIE-LCH	lch(13.46, 35.42, 297.06°)
OKLab	oklab(26.03% 0.0062 -0.0907)
OKLCH	oklch(26.03% 0.091 273.9)
XYZ	xyz(2.2269, 1.6372, 7.5943)
Luminance	0.0164 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D4F #4F4A18

analogous

#18394F #181D4F #2E184F

triadic

#181D4F #4F181D #1D4F18

tetradic

#181D4F #4F1839 #4F4A18 #184F2E

square

#181D4F #4F1839 #4F4A18 #184F2E

split-complementary

#181D4F #4F2E18 #394F18

monochromatic

#070917 #0A0C20 #181D4F #262E7E #353FAD

Accessibility & contrast

On white

15.82

#181D4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#181D4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D4F

15.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D4F	#FFFFFF	#000000	##FFFFFF
##181D4F	1.00	15.82	1.33	15.82
#FFFFFF	15.82	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002551

Deuteranopia (green-blind)

#00204E

Tritanopia (blue-blind)

#002932

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181d4f;
/* rgb */ color: rgb(24, 29, 79);
/* oklch */ color: oklch(26.0% 0.091 273.9);

Tailwind

colors: {
  custom: {
    50: '#5c5881',
    500: '#181d4f',
    950: '#000000',
  },
}

SCSS

$custom: #181d4f;
$custom-light: #5c5881;
$custom-dark: #000000;

JSON

{
  "hex": "#181d4f",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 79
  },
  "hsl": {
    "h": 234.545,
    "s": 53.398,
    "l": 20.196
  },
  "oklch": {
    "l": 0.26027,
    "c": 0.09092,
    "h": 273.9
  },
  "luminance": 0.01637
}

Semantic roles & 50–950 ramp

primary

#181D4F

secondary

#867F3D

accent

#D04BDD

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181D4F

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →